Venango Formation

Venango Formation - Light-gray siltstone interbedded with some flaggy, gray sandstone and some bluish-gray shale; Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation; referred to as "Cattaraugus" by some workers; includes some red shales where it interfingers to the east and south with the Catskill Formation; marine fossils present.
State Pennsylvania
Name Venango Formation
Geologic age Devonian
Primary rock type siltstone
Secondary rock type sandstone
Other rock types shale; conglomerate
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Conglomerate (Bed)Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation
Minor
Sedimentary > Clastic > Sandstone (Bed)some flaggy, gray sandstone; Panama Conglomerate and Woodcock Sandstone are, respectively, the lower and upper key beds defining the formation
Sedimentary > Clastic > Mudstone > Shale (Bed)some bluish-gray shale; includes some red shales where it interfingers to the east and south with the Catskill Formation; marine fossils present.
Map references
Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip
Unit references
Berg, T. M., Edmunds, W. E., Geyer, A. R., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey, 4th ser., Map 1, 2nd ed., 3 sheets, scale 1:250,000.
Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map. Retrieved from internet 9-30-2004; <http://www.dcnr.state.pa.us/topogeo/map1/bedmap.aspx> DL Data: pageoexp.zip
Counties Crawford - Erie - Forest - McKean - Warren